Invalidity dossier

US 10544228

Nucleic acids encoding antibody polypeptides that antagonize CD40

Current assignee: Domantis Ltd

Added 9/21/2026, 10:21:07 AM

At a glanceNo PTAB challengesNo litigation on file

Active provider: DeepSeek · deepseek-flash

Patent summary

Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.

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Patent Overview — US10544228B2

Title: Nucleic acids encoding antibody polypeptides that antagonize CD40

Source: https://patents.google.com/patent/[US10544228](/patent/US10544228)/en

Bibliographic data (as shown in the excerpt): Patent number US10544228B2; application US15/259,828; filed 2016-09-08; granted 2020-01-28; priority date 2011-04-21; adjusted expiration 2034-10-02; status listed as Active. Current assignees listed as Domantis Ltd and Bristol Myers Squibb Co. Inventors listed: Anish Suri, Steven Sheriff, Suzanne Suchard, Aaron Yamniuk, Stanley Krystek, James Tamura, James Bryson, Steven Grant, Philip Drew. A prior-art keyword listing includes "bms3h," "antibody," "amino acid," "variable domain," and "seq." Classifications place it in C07K16/2878 (antibodies against NGF-receptor/TNF-receptor superfamily, e.g. CD27, CD30, CD40, CD95), with additional A61K and A61P therapeutic classifications.

Purpose: The title states the subject matter is nucleic acids encoding antibody polypeptides that antagonize CD40 — i.e., the claimed nucleic acids encode antibody polypeptides characterized by CD40-antagonist activity.

Plain-language scope (as far as the excerpt shows): Based only on the supplied text, the patent concerns nucleic acid molecules that encode antibody polypeptides capable of antagonizing CD40, an immune cell surface receptor. The classification and litigation/homepage metadata do not themselves define claim scope.

What the excerpt does not establish:

  • The actual wording of any claim, and therefore the precise metes and bounds of the monopoly.
  • The specific nucleotide or amino acid sequences (SEQ ID NOs) covered, antibody formats, CDR sequences, or CD40-binding properties.
  • Whether, or how, the nucleic acids are used in expression systems, vectors, host cells, pharmaceutical compositions, or treatment methods.
  • The identity of any prior art or the basis of patentability.
  • The completeness of the specification, figures, or claims, which are not reproduced here.

The excerpt contains bibliographic and classification metadata and images only; the substantive description and claims are omitted. No litigation status, ownership history, validity, or prior-art conclusions are drawn here.

Generated 10/1/2026, 10:01:45 PM

Cases on file (0)

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Litigation summary

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Proceedings on file (0)

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AIA trial proceedings (IPR / PGR / CBM) filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced from the USPTO Open Data Portal and refreshed every six hours; each proceeding number deep-links to the PTAB E2E docket.

No PTAB proceedings on file. This patent has not been challenged via IPR, PGR, or CBM. The absence is itself a signal — well-asserted patents eventually attract IPRs. The LLM analysis below may surface filings the ODP feed hasn’t indexed yet.

PTAB challenges

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Assignment history

Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.

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Prior art

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Obviousness

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Extensions

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Derivative works

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